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Five hospital trusts, including two in the Anglia region, are to be investigated over their mortality rates. The NHS Commissioning Board announced the move today, following the publication of the inquiry into mistreatment and neglect of patients at Mid-Staffordshire NHS Foundation Trust.

Medical director Sir Bruce Keogh is to launch an immediate investigation into the Colchester Hospital University NHS Foundation Trust and the Basildon and Thurrock University Hospitals NHS Foundation Trust together with trusts in Tameside, Blackpool and East Lancashire.

The NHS board said that the five trusts have been "outliers" on the Summary Hospital-level Mortality Indicator for two successive years to 2012.

The news follows the publication of the Francis Report into events at the Stafford trust between 2005 and 2009, which called for a "zero tolerance" approach to poor standards in the health system.